EP1396746A3 - Zoom lens and camera using the same - Google Patents

Zoom lens and camera using the same Download PDF

Info

Publication number
EP1396746A3
EP1396746A3 EP03255359A EP03255359A EP1396746A3 EP 1396746 A3 EP1396746 A3 EP 1396746A3 EP 03255359 A EP03255359 A EP 03255359A EP 03255359 A EP03255359 A EP 03255359A EP 1396746 A3 EP1396746 A3 EP 1396746A3
Authority
EP
European Patent Office
Prior art keywords
lens unit
zoom lens
camera
same
side focus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03255359A
Other languages
German (de)
French (fr)
Other versions
EP1396746B1 (en
EP1396746A2 (en
Inventor
Nurishi c/o Canon Kabushiki Kaisha Riyji
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Publication of EP1396746A2 publication Critical patent/EP1396746A2/en
Publication of EP1396746A3 publication Critical patent/EP1396746A3/en
Application granted granted Critical
Publication of EP1396746B1 publication Critical patent/EP1396746B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
    • G02B7/102—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens controlled by a microcomputer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
    • G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
    • G02B15/17—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +--

Abstract

Small zoom lens capable of carrying out focusing through manual operations in autofocus mode. The zoom lens apparatus includes a variator lens unit (V), an object-side focus lens unit (F1) located closer to the object than the variator lens unit, and an image plane-side focus lens unit (F2) located closer to the image plane than the variator lens unit. Driving of the object-side focus lens unit by manual operations is enabled when the autofocus mode is active.
EP03255359A 2002-08-30 2003-08-28 Zoom lens and camera using the same Expired - Lifetime EP1396746B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002255355A JP4298241B2 (en) 2002-08-30 2002-08-30 Zoom lens device
JP2002255355 2002-08-30

Publications (3)

Publication Number Publication Date
EP1396746A2 EP1396746A2 (en) 2004-03-10
EP1396746A3 true EP1396746A3 (en) 2004-03-17
EP1396746B1 EP1396746B1 (en) 2005-11-16

Family

ID=31712268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03255359A Expired - Lifetime EP1396746B1 (en) 2002-08-30 2003-08-28 Zoom lens and camera using the same

Country Status (4)

Country Link
US (1) US6847495B2 (en)
EP (1) EP1396746B1 (en)
JP (1) JP4298241B2 (en)
DE (1) DE60302305T2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4579572B2 (en) * 2004-04-28 2010-11-10 キヤノン株式会社 Drive control device for optical equipment
JP4708737B2 (en) * 2004-06-04 2011-06-22 キヤノン株式会社 Lens device
JP5759209B2 (en) * 2011-03-04 2015-08-05 キヤノン株式会社 Zoom lens and imaging apparatus having the same
CN104267486B (en) * 2014-10-14 2016-06-15 福建福光股份有限公司 25.2 zoom high definition television pick-up lens again
JP6377009B2 (en) * 2015-04-24 2018-08-22 キヤノン株式会社 Optical system and imaging apparatus having the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58129404A (en) * 1982-01-27 1983-08-02 Minolta Camera Co Ltd Zoom lens system capable of manual and automatic focusing
US4609260A (en) * 1983-05-20 1986-09-02 Canon Kabushiki Kaisha Automatic focusing apparatus for zoom lens
US4890132A (en) * 1987-03-26 1989-12-26 Asahi Kogaku Kogyo Kabushiki Kaisha Manual control apparatus of zoom lens barrel for an auto focus camera
US5448328A (en) * 1992-02-07 1995-09-05 Canon Kabushiki Kaisha Vibration driven system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58129404A (en) * 1982-01-27 1983-08-02 Minolta Camera Co Ltd Zoom lens system capable of manual and automatic focusing
US4609260A (en) * 1983-05-20 1986-09-02 Canon Kabushiki Kaisha Automatic focusing apparatus for zoom lens
US4890132A (en) * 1987-03-26 1989-12-26 Asahi Kogaku Kogyo Kabushiki Kaisha Manual control apparatus of zoom lens barrel for an auto focus camera
US5448328A (en) * 1992-02-07 1995-09-05 Canon Kabushiki Kaisha Vibration driven system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 241 (P - 232) 26 October 1983 (1983-10-26) *

Also Published As

Publication number Publication date
DE60302305T2 (en) 2006-06-29
US20040051966A1 (en) 2004-03-18
JP2004093938A (en) 2004-03-25
US6847495B2 (en) 2005-01-25
DE60302305D1 (en) 2005-12-22
JP4298241B2 (en) 2009-07-15
EP1396746B1 (en) 2005-11-16
EP1396746A2 (en) 2004-03-10

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